JP2985215B2 - Digital equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital device, and more particularly, to a digital device intended to facilitate a function check of a circuit block in the device.

[Conventional technology]

Conventionally, in order to check the function of a device having a plurality of circuit blocks, a generator for generating a test signal and a checker for detecting the presence / absence of an abnormality are used, and this function check is performed, for example, as shown in FIG. 4 or FIG. It was performed by such a check system.

FIG. 4 shows a generator 71, a set 72, and a checker 73.
Is shown.

A test signal, for example, DC,
A sine wave, a pulse wave and the like are formed and supplied to the set 72.

Inside the set 72, circuit blocks 72A, 72B, 72C are cascaded from the input side to the output side as shown in the figure, and the above-described test signals are subjected to predetermined signal processing in each of the circuit blocks 72A to 72C. After receiving, it is supplied to the checker 73.

The checker 73 observes the test signal output from the set 72 and detects whether there is any abnormality in the circuit blocks 72A to 72C inside the set 72.

According to the check system of FIG. 5, a check board 74 provided with a generator circuit and a check circuit is prepared in advance, and the check board 74 is inserted into the board insertion portion 75 of the set 72, and the check is performed. The test signal output from the generator circuit of the test board 74 is supplied to the circuit block inside the set 72, and based on the test signal fed back to the check circuit of the check board 74, the abnormality of the circuit block inside the set 72 is determined. It detects the presence or absence.

[Problems to be solved by the invention]

The conventional function check as described above has a problem that a special check system must be configured for the function check in any of the check systems shown in FIG. 4 and FIG. For this reason, there is a problem that the procedure of the function check is complicated, that the function check takes much time, and that the cost required for the function check becomes high.

In particular, as shown in FIG. 5, when the dedicated check substrate 74 is formed, the problem of cost increase occupies a large proportion.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a digital function that can easily check the function of a circuit block.

[Means for solving the problem]

The present invention relates to a digital device having a plurality of circuit blocks including a plurality of processing stages including an input stage and a final output stage, and control means for controlling the circuit blocks. A loop signal system for transmitting a diagnostic signal to at least one of the plurality of circuit blocks, a circuit for performing normal signal processing, a generator for generating a test signal, and a detector for detecting an abnormality. A test signal is generated from at least one generator means in accordance with a command from the control means, and an abnormality is detected by at least one checker means.
The digital device is characterized in that it is possible to check the function of the entire circuit block including a block having an abnormality in each circuit block or a portion connecting a plurality of circuit blocks.

[Action]

A test signal generated by a generator of a certain circuit block is supplied to a checker after undergoing predetermined signal processing in the circuit block, and the checker can perform a function check.

〔Example〕

One embodiment of the present invention will be described with reference to FIGS. This embodiment will be described in the following order.

(1) About the entire system of the digital audio mixer (2) About the video sound processor (3) Modifications (1) About the entire system of the digital audio mixer FIG. 1 shows the overall configuration of the digital audio mixer.

In FIG. 1, reference numeral 1 denotes a host computer. The host computer 1 performs various controls on the digital audio mixer 2, including control of a schedule for sending a program and control of on-air timing.

The digital audio mixer 2 mainly includes an editor 3, an operation control panel 4, a switcher controller 5, a digital video switcher 6, a video sound processor 7, cart machines 8, 9, and the like.

The editor 3 controls the entire operation of the digital audio mixer 2 based on various control signals supplied from the operation control panel 4 or the host computer 1. In the editor 3, control signals for controlling each circuit block are formed on the basis of the above-mentioned control signals. These control signals are used by the operation control panel 4, the switcher controller 5, the digital video switcher 6, the video sound processor 7, and the like. Are supplied respectively.

The editor 3 supplies a control signal to a cart controller provided in each of the cart machines 8 and 9. Under the control of the cart controller, for example, three player VTRs and one recorder VTR are selected from the VTRs provided in each of the cart machines 8 and 9, and audio signals and video signals are reproduced. It is supplied to a digital video switcher 6 and a video sound processor 7.

The digital video switcher 6 performs signal processing such as special effects and mixing on the video signal supplied from the player VTR.
The audio signal supplied from the player VTR is subjected to signal processing such as special effects and mixing. Thereafter, the audio signal and the video signal subjected to the signal processing are recorded in the recorder VTR in each of the cart machines 8 and 9. Under the control of the cart controller, audio signals and video signals are recorded in the recorder VTR in each of the cart machines 8 and 9.

The operation control panel 4 includes a display portion indicating the state of the system selected by the editor 3, for example, a VTR selected in the cart machines 8 and 9 described below,
A switch operation part operated manually is provided.

The operation controller panel 4 is provided for manually operating the digital audio mixer 2 in place of the editor 3, and is provided with a control signal formed by operating a switch operation portion of the operation control panel 4. Is supplied to the editor 3, the switcher controller 5, the video sound processor 7 and the like, and further supplied to the cart machines 8, 9 via the editor 3.

The switcher controller 5 controls the digital video switcher 6 based on a control signal supplied from the operation control panel 4 or the editor 3.

The digital video switcher 6 is a cart machine 8, 9
Captures video signals reproduced from a plurality of player VTRs at Then, the video signal is mixed and processed, and special effects such as FEC, Wipe, and Scroll are applied. The processed video signals are sent to cart machines 8, 9
Is supplied to the recorder VTR and recorded.

The video sound processor 7 is controlled based on a control signal supplied from the operation control panel 4 or the editor 3. In the video sound processor 7,
Audio signals reproduced from a plurality of player VTRs in the cart machines 8 and 9 are captured. Then, a signal processing function set by an adjustment knob of a function operation unit (not shown) for the audio signal, for example, an equalizer,
Perform processing such as dynamics and crossfade. The processed audio signal is supplied to a recorder VTR in the cart machines 8 and 9 and recorded.

Each of the cart machines 8 and 9 has three player VTRs.
And a recorder VTR, and the cart controller controls these VTRs, controls an elevator that supplies a tape cassette to the VTR, and the like.

The cart machine 8 is for programs, and the cart machine 9 is for commercials. The VTRs provided in the cart machines 8 and 9 are all digital VTRs, and are VTRs capable of forming a so-called D-1 or D-2 format recording pattern. Therefore, one VTR requires four channels, and two cart machines 8 and 9 require 32 channels.

From the terminals 10 and 11 of the cart machines 8 and 9, video signals for transmission reproduced from the recorder VTR are taken out.
From the terminals 12 and 13, an audio signal for transmission is extracted. In this embodiment, there are three player VTRs and one recorder VTR. However, the present invention is not limited to this, and an arbitrary number of settings can be made.

(2) Video Sound Processor FIG. 2 shows a configuration of the video sound processor 7.

The video sound processor 7 mainly includes a controller 21, a processor 22, a floppy disk drive 23, a key switch 24, a meter 25, and the like.

The controller 21 performs overall control of the video sound processor 7 based on a control signal supplied from the editor 3 or the operation control panel 4.

The control signal from the controller 21 controls the floppy disk drive 23, and the floppy disk drive 23 downloads necessary programs to the controller 21 from a floppy disk (not shown).

The control data of the snapshot can be stored in a memory (not shown), and the control data can be recorded on a floppy disk by the controller 21 later.

The processor 22 is provided in a rack, and is connected to the controller 21 by a 15-core multi-cable.

The processor 22 performs processing such as equalizer, dynamics, servo crossfader, A / B bus crossfader, filtering, delay, and the like on the audio signal reproduced and supplied from the player VTR, and performs mixing. .

The above-described key switch 24 and meter 25 are provided on a control console (not shown) together with a switch operation portion of the operation control panel 4, and a signal input from the key switch 24 is supplied to the controller 21. As the meter 25, for example, a plasma display is used, and six bar-shaped ones for displaying a level are used, two of which are used for monitoring and four are used for four channels of output. For signal level display.

FIG. 3 shows the internal structure of the processor 22 described above.

As shown, a plurality of circuit blocks are cascaded from the input side to the output side inside the set. In each circuit block, input / output selectors 34, 39, 43, 47 for selectively switching input / output signals, and generators 35, 40, 44, 48 for generating test signals under the control of the controller 21 in the test mode. And checkers 36, 41, 45, and 49 for detecting the presence or absence of an abnormality under the control of the controller 21 in the test mode. The test mode described above is a mode for performing a self-diagnosis of the presence or absence of an abnormality.

A loop signal path 31 for feeding back a test signal is provided between the input-stage circuit block and the output-stage circuit block, and each circuit block is connected to the main bus 32 of the controller 21. .

An input / output selector 34, a generator 35, and a checker 36 are provided in an input unit 33 as a circuit block of the input stage.

The input / output selector 34 selects a signal on each of the input side and the output side of the input unit 33.

On the input side of the input / output selector 34, based on a control signal supplied from the controller 21 via the main bus 32,
Audio signal from terminal 37 or loop signal path 31
A selection is made among the test signals that have passed through.

In the test mode in which the function check is performed and the input unit 33 is designated as the diagnostic circuit block in which the function check is performed, the test signal passing through the loop signal path 31 is selected, and the above-described loop signal path 31 and the checker are checked. The test signal is supplied to the checker 36 to detect the presence or absence of an abnormality.

If the above conditions are not satisfied, that is, in the case of a normal operation for processing an audio signal, or when the input unit 33 is not designated as a diagnostic circuit block for performing a function check, the audio signal or the test signal is It is supplied to the output side of the input / output selector 34 as it is.

On the output side of the input / output selector 34, in the test mode,
One of a test signal formed by the generator 35 based on a control signal supplied from the controller 21 via the main bus 32, and an audio signal or a test signal selected on the input side of the input / output selector 34, controller
Selected by 21 controls.

In the test mode and under the condition that the input unit 33 is specified as a circuit block for generating a test signal, the test signal formed by the generator 35 is selected. If the above condition is not satisfied, the input / output selector The audio signal or test signal selected at the input side of 34 is selected. The signal selected by the input / output selector 33 is supplied to the data processing unit 38 in the next stage.

The data processing unit 38 is provided for each channel. The data processing unit 38 includes an input / output selector 39, a generator 40, and a checker 41 in addition to a circuit (not shown) for performing original signal processing. Is provided.

On the input side of the input / output selector 39, based on a control signal supplied from the controller 21 via the main bus 32,
The audio signal or the test signal supplied from the input unit 33 is supplied to one of the checker 41 and a circuit that performs signal processing.

Under the condition that the test mode is specified as the diagnostic circuit block in which the data processing unit 38 performs the function check in the test mode, the test signal supplied from the input unit 33 is selected, and the test signal is supplied to the checker 41, and the abnormality is detected. Is detected.

If the above conditions are not met, the data processing unit 38 performs predetermined signal processing on the audio signal or the test signal supplied from the input unit 33.

On the output side of the input / output selector 39, in the test mode,
One of a test signal formed by the generator 40 based on a control signal supplied from the controller 21 via the main bus 32 and an output of a circuit that performs signal processing is selected under the control of the controller 21.

In the test mode and under the condition that the data processing unit 38 is designated as a circuit block for generating a test signal, the test signal formed by the generator 40 is selected. selector
The audio signal or test signal selected at the input of 39 is selected. The signal selected by the input / output selector 39 is supplied to the next-stage mix section 42.

The mixing unit 42 mixes audio signals of a plurality of channels. The mixing unit 42 includes an input / output selector 43, a generator 44, and a checker 45 in addition to a circuit (not shown) for performing original signal processing. Is provided.

On the input side of the input / output selector 43, based on a control signal supplied from the controller 21 via the main bus 32, an audio signal or a test signal supplied from the data processing unit 38 is output to a checker 45 or a circuit for performing signal processing. Supply to one side.

In the test mode and under the condition that the mixing unit 42 is designated as a diagnostic circuit block for performing a function check, the test signal supplied from the data processing unit 38 is selected, and the test signal is supplied to the checker 45, and Is detected.

If the above conditions are not satisfied, the audio signal or the test signal supplied from the data processing unit 38 is subjected to predetermined signal processing in the mixing unit 42.

On the output side of the input / output selector 43, in the test mode,
One of a test signal formed by the generator 44 based on a control signal supplied from the controller 21 via the main bus 32 and an output of a circuit for performing signal processing are selected.

In the test mode and under the condition that the mixing unit 42 is designated as a circuit block for generating a test signal, the test signal formed by the generator 44 is selected, and
If the above conditions are not met, the audio signal or test signal selected on the input side of the input / output selector 43 is selected. The signal selected by the input / output selector 43 is supplied to the output unit 46 in the next stage.

The output unit 46 includes an input / output selector 47 and a generator 4
8. A checker 49 is provided.

On the input side of the input / output selector 47, based on a control signal supplied from the controller 21 via the main bus 32,
The audio signal or the test signal supplied from the mixing unit 42 is selected.

In the test mode and under the condition that the output unit 46 is designated as a diagnostic circuit block for performing a function check, the test signal supplied from the mix unit 42 is selected, and
This test signal is supplied to the checker 49, and the presence or absence of an abnormality is detected.

When the above condition is not satisfied, that is, during the normal operation, the audio signal supplied from the mixing unit 42 is supplied to the output side of the input / output selector 47. Also, even in the test mode, if the output unit 46 is not designated as a diagnostic circuit block for performing a function check, the mixing unit 42
Is supplied to the output side of the input / output selector 47.

On the output side of the input / output selector 47, a test signal formed by the generator 48 based on a control signal supplied from the controller 21 via the main bus 32 in the test mode and a signal selected by the input side of the input / output selector 47 One of the test signal and the normal audio signal is the controller
The audio signal is selected by the control of 21 and the audio signal is
And the test signal is provided to a loop signal path 31.

In the test mode and under the condition that the output section 46 is designated as a circuit block for generating a test signal, a test signal formed by the generator 48 is selected and supplied to the loop signal path 31. If the output section 46 is not designated as a circuit block for generating a test signal even in the test mode, the test signal supplied from the mixing section 42 is supplied to the loop signal path 31 and furthermore, the normal operation is performed. In this case, the audio signal supplied from the mixing unit 42 is taken out from the terminal 50.

According to the illustrated configuration, the presence or absence of an abnormality can be confirmed at the level of each circuit block or at the level of the entire set.

The setting of the test mode and the designation of a circuit block to be tested or the designation of a generator and a checker to be operated are inputted from the key switch 24, and these signals are supplied to the controller 21.

For example, when performing a function check on the entire set, the controller 21 controls the generator 35 of the input unit 33 to form a test signal, and the formed test signal is processed by the data processing unit 38, the mixing unit 42, Output unit 46,
Further, the data is fed back to the checker 36 of the input unit 33 via the loop signal path 31.

The test signal generated by the generator 35 is subjected to signal processing by the data processing unit 38 and the mixing unit 42, respectively, and thereafter, the presence or absence of abnormality is detected by the checker 36 of the input unit 33.

If an abnormality is detected, an LED can be configured to be turned on, so that the presence or absence of the abnormality can be easily determined. Thereby, the function check can be performed on the entire set.

If the function check of the entire set described above confirms that there is an abnormality, it is possible to identify the part having the abnormality. This is useful when each circuit block is normal in itself, but there is an abnormality between boards, for example, in a connector.

For example, when the test mode is set by operating the key switch 24 and the generator 35 and the checker 45 to be operated are designated, these signals are supplied to the controller 21. The controller 21 controls the operation of each circuit block based on the above-mentioned signal supplied from the key switch 24. The input unit is controlled by the controller 21.
The test signal is formed by the generator 35 of 33, and the input section 33
After the signal processing is performed in the data processing unit 38 of the next stage through the input / output selector 34 of, the signal is supplied to the checker 45 through the input / output selector 43 of the mixing unit 42. The connector 45 between the input unit 33 and the data processing unit 38 and the data processing unit 38
Among them, it is confirmed that any of the connectors between the data processing unit 38 and the mixing unit 42 has an abnormality.

Similarly, by performing a function check for each of three consecutive circuit blocks, a portion having an abnormality can be specified.

The number of circuit blocks to be tested is not limited to one as in the above example, but may be performed over two or more circuit blocks.

In the input unit 33, the data processing unit 38, the mixing unit 42, and the output unit 46, the test signals formed by the generators 35, 40, 44, and 48 are provided to the generators 35, 40, 44, and 48. To the relevant circuit blocks,
The signal subjected to the signal processing is checked by the checker of the circuit block.
By configuring to return to 36, 41, 45, 49, the input unit 33, the data processing unit 38, the mixing unit 42, the output unit 46,
It can be checked by each circuit itself.

In this way, after the test signal from the generator is processed by the target circuit block, the abnormality is detected by the checker of the next circuit block, so that the function check should be performed as needed as needed. Thus, the function check can be easily performed without taking much time, and the cost of the function check can be reduced as compared with the related art.

(3) Modification Example Input unit 33, data processing unit 38, mixing unit 42, output unit 46
It is also possible to replace the functions of the generators 35, 40, 44, 48 and the checkers 36, 41, 45, 49 provided therein with control of the controller 21 based on a program.

For example, the input unit 33, the data processing unit 38, the mixing unit 42,
A register is provided in the output unit 46, and test data is supplied from the controller 21 to the input unit 33, the data processing unit 38, the mixing unit 42, and the output unit 46 via the main bus 32.

In each circuit block, the test data supplied from the controller 21 is taken into a register, the test data is read from this register, signal processing is performed based on the test data, and the result is stored in the register.

In response to a request from the controller 21, the data stored in the register is read and analyzed by the controller 21. As a result, the functions of the input unit 33, the data processing unit 38, the mixing unit 42, and the output unit 46 are checked, and the presence or absence of an abnormality is detected. As in the case of the first embodiment, the test data supplied from the controller 21 is signal-processed through the input unit 33, the data processing unit 38, the mixing unit 42, the output unit 46, and the loop signal path 31. ,
It is possible to confirm the presence / absence of an abnormality in the entire set and perform a function check.

〔The invention's effect〕

According to the digital device of the present invention, after the test signal from the generator is processed by the target circuit block, the presence or absence of an abnormality is detected by the checker. The function check can be performed at any time, and the function check can be easily performed without taking much time. Further, there is an effect that the cost of the function check can be significantly reduced as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing a configuration of a video sound processor,
FIG. 3 is a diagram showing the internal configuration of the processor, and FIGS. 4 and 5 are diagrams showing an example of a conventional function check. Explanation of main symbols in the drawings 2: digital audio mixer, 22: processor, 31: loop signal path, 33: input section, 35, 40, 44, 48: generator, 36, 41, 45, 49, 73: checker, 38: data processing section, 42: mix section, 46: output section.

Claims (1)

(57) [Claims] 1. A digital device having a plurality of circuit blocks each including a plurality of processing stages including an input stage and a final output stage, and control means for controlling them, wherein: A loop signal system for transmitting a diagnostic signal to the circuit block of the above, and at least one of the plurality of circuit blocks, a circuit for performing normal signal processing, and a generator for generating a test signal. And a checker means for detecting an abnormality. At least one of the generator means generates a test signal in accordance with a command from the control means, and detects an abnormality by at least one of the checker means. Includes blocks with abnormalities among the blocks or the parts connecting the above multiple circuit blocks Digital devices, characterized in that to enable the function check of the whole circuit block.